Lines Matching refs:fo
989 def filter_scanline(type, line, fo, prev=None): argument
1006 ai = -fo
1017 ai = -fo
1027 ai = -fo # also used for ci
2942 fo = 3 # bytes per pixel
2944 out = filter_scanline(0, line, fo, None) # none
2946 out = filter_scanline(1, line, fo, None) # sub
2948 out = filter_scanline(2, line, fo, None) # up
2953 out = filter_scanline(3, line, fo, None) # average
2955 out = filter_scanline(4, line, fo, None) # paeth
2964 fo = 3
2965 out = filter_scanline(0, line, fo, prev) # none
2967 out = filter_scanline(1, line, fo, prev) # sub
2969 out = filter_scanline(2, line, fo, prev) # up
2971 out = filter_scanline(3, line, fo, prev) # average
2973 out = filter_scanline(4, line, fo, prev) # paeth